G-code syntax highlighting for Geany ?

Title = the question. Does this exist ?
I did search the forum.

edit: It turns out Mousepad does g-code highlighting.   gcode.lang and ngc.lang are hiding in /usr/share/gtksourceview-2.0/language-specs/ so needed to be linked to gtksourceview-3.0
Running Debian 10 with xfce

I have looked at this in the past for Geany and not get very far.

geany.org/manual/hacking.html#adding-a-filetype

There is a lexer file here:
www.dynomotion.com/forum/archive/attachments/LexGCode-3150.cxx

But I have not tried combining it with Geany.

I checked last night, could not find anything useful.